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Signed-off-by: András Schmelczer <andras@schmelczer.dev>

good_ai/src/sus/evaluate_ranking/draw_f1_iso_lines.py

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+from typing import Optional
+
+import matplotlib.pyplot as plt
+import numpy as np
+from matplotlib.axes import Axes
+
+
+def draw_f1_iso_lines(
+    resolution: int = 1000,
+    min: float = 0.2,
+    max: float = 0.8,
+    steps: int = 4,
+    axes: Optional[Axes] = None,
+) -> None:
+    if axes is None:
+        axes = plt.axes()
+
+    for f_score in np.linspace(min, max, num=steps):
+        x = np.linspace(f_score / (2 - f_score), 1, num=resolution)
+        y = f_score * x / (2 * x - f_score)
+
+        axes.plot(x[y >= 0], y[y >= 0], color="gray", alpha=0.2)
+
+        axes.annotate(
+            f"f1={f_score:0.1f}",
+            backgroundcolor="w",
+            xy=(0.9, y[int(resolution * 0.9)] + 0.02),
+        )